Open AccessComputer generated holography based on Fourier transform using conjugate symmetric extension
Author(s) -
Sujuan Huang,
Shuozhong Wang,
Yu Ying-Jie
Publication year - 2009
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
ISSN - 1000-3290
DOI - 10.7498/aps.58.952
Subject(s) - holography , fourier transform , digital holography , interference (communication) , computer generated holography , computer science , optics , amplitude , complex conjugate , algorithm , artificial intelligence , physics , mathematics , mathematical analysis , telecommunications , channel (broadcasting)
A new computer generated holography (CGH) algorithm based on Fourier transform is proposed. The complex amplitude of the light wave to be recorded is extended to produce a conjugate symmetric function. The function is then Fourier transformed to generate a real valued distribution containing both the amplitude information and the phase information of the light wave. The obtained real distribution is coded to give a gray-scale hologramwhich can be used to reconstruct the original light wave. Unlike the existing CGH algorithms based on interference of object and reference light wavesthe proposed method does not require simulatingthe interference to produce the hologram. The algorithm is highly efficientand can produce good results both in digital and electroholographic reconstruction. Theoretical and experimental results are presented to verify the validity of the method.